Valve



Jan. 30, 1923. 1,443,847

J. R, MCELRATH. FIL@ gTLT/Ee, 1920.

INVENTOR.

` ATTORNEY.

Patented Jan. 30, 1923.

UNITE STTES JAMES ROBERT MCELRATH, or NEsooPiioK, PENNSYLVANIA, -AssIGNoR orroNni THIRD TO W. J. WALKER. AND ONE-THIRD TO CHARLES W. ROBLES NEWARK, NEW JERSEY.

, BOTH OF VALVE.

Application filed October 26,' 1920. Serial No. 419,600.

To all whom t may concern.'

Be it known that l., JAMES ROBERT Mo- ELRATH, a citizen of the United States, residing at Nescopeck, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in a Valve, of which the following is a specification. v

This invention relates to a .valve mechanism designed for use in connection with hydraulic presses and has for its object to provide, in a manner as hereinafter set forth, means whereby the exhaust water from the main cylinder of the press is quickly returned to the reservoir therefor simultaneously with the raising of the ram of the press.

Vith reference to the opera-tion of hydraulic presses, the cylinder thereof is supplied with reservoir or low pressure water during the down stroke of the ram or plunger to overcome the employment of too much high pressure water, and immediately the material, which is to be operated on, is impacted upon by the ram or plunger, the valve controlling the supply of low pressure is closed and this closing of the valve divides the high pressure from the low pressure supply. The operation of the ram or plunger on the material is had by high pressure water. In the general form of hydraulic presses, the supply valve mechanism employed in connection therewith, is such that it will not permit the low pressure water to pass directly therethrough to the reservoir from the cylinder on release of the ram, and such low pressure water will have to pass back through the highv pressure supply, thence through the operating valve at the base of the press and then be returned to the top of the reservoir, traveling a distance of about sixty feet in all, under such operation` the press is a very slow acting one caused by the time of return of the water and also through the friction set up by the short bends and short pipes through which the water travels to the reservoir, and toovercome this direction of travel of the wateren its ret-urn to the reservoir, as well as to provide for a quick return and a quick acting'press, is the primary object of this invention, and this is accomplished, in a manner as hereinafter set forth, by the providing of means to open the valvular element, valve mechanism associated with the supply of the 'low pressurewater from the reservoir,- immediately upon the starting of the release of the'press wherebythe low pressure water can return directly through thevsupply valve mechanism to the reservoir, and such return requiring but a travel of approximately four feet, and such short travel of the lowpressure water to the reservoir will, as is obvious, materially quicken or increase speed of the press. y

Futher objects of the invention are to provide a valve mechanism for the purpose set forth which is simple inits construction and arrangement, strong, durable, efficient in its use, readily set up and comparatively inexpensive.

.With the foregoing and other objects in view, the invention consists of the novel construction, combination andarranoement of parts, as hereinafter more specifically described and illustrated in the accompanying drawing', wherein is shown an embodiment of the invention, but it is to be'understood that changes, variations and modifications can'be resorted to which come within the scope of the claims hereunto appended.V

As illustrating, a valve mechanism in accordance with this invention for the purpose set forth, reference is had to the accompanying drawing which shows the valve mechanism in vertical section.

Referring to the drawing in detail,'1 denotes a valve casing provided with a combined'inlet and exhaust channel 2, for low pressure water and which" is adapted to communicate with a reservoir, not shown. rThe casing ll, is furthermore provided' with 'a combined supply andexhaust port S, which is adapted to open into the cylinder, not shown, of the press and extending from the upper end of the portS, is a port 9, which opens into a high pressure water pipe, not shown. The valve casing l, is also provided withv a water space 6', and a port 7, leading from the latter and opening into the ports 8, 9. A vertical passage 3a, arranged centrally of the casing l, is provided for establishing communication between the water spacel 6, and the inner end of the channel 2, and at the upper end ofthe passage 3a, an annular valve seat 3, is mounted. At the upper porof vthe supplyV that any modifications within the scope of the claimed invention may be in the construction without departing from the prin` ciple of the invention or sacrificing any ot its advantages.

Vhat I claim is l. A valve mechanism for use in connection with hydraulic piesses comprising a casing formed with a portcommunicating with a high pressure supply and with the cylinder of the press and further having a channel opening into a low pressure reser` voir, a valvular element mounted in said casing for separating said port from said channel to discontinue low pressure supply to the press at the starting of the operation 0i the press on the material, and a high pressure operated means n'iounted in said casing and connected to said element for shifting it to open position to provide for the discharge of the water through the casing to the reservoir on the starting of the release of the press on the material.

2. A valve mechanism for use in-connection. with hydraulic presses comprising al casing formed with a port, communicating' with the high pressure supply and with the cylinder or the press and further having a channel opening into a low pressure reservoir, a valvular element mounted in said casing for separating' said port from said channel to discontinue low pressure supply to the press at the starting of the oper ation of the press on the material, a plug seated in said casing and provided with a guide for said element, a cylinder secured in the plug and formed with a passage opening into the lower end thereof and communicating with the high pressure supply, a stem carried by said element and extending nto said cylinder, and a piston carried by the stem and arranged within said cylinder above the point of communication of the passage therewith for shifting said element to open position on the supply of high pressure to lthe cylinder to provide for the discharge of water from the press through said channel to the reservoir simultaneously with the starting ot the release ot the press on the material.

3. A valve mechanism for use in connection with hydraulic presses comprising a casing formed with a porti communicating with the high pressure supply and with the cylinder of the press and further having a channel opening into a low pressure reservoir, a valvular element mounted in said casing for separating said port from said channel to discontinue low pressure supply to the press at the starting of the operation of the press on the material, a plug seated in said casing and provided with a guide for said element, a cylinder secured in the plug and formed with a passage opening into the lower end thereof and communicating with the high pressure supply, a stem carried by said element and extending into said cylinder and a piston carried by the stem and arranged within said cylinder ahsove the point of communication. of V@the passage therewith for shifting said element to open position on the supply of high pressure to the cylinder to provide for the discharge of water from the press through said channel to the reservoir simultaneously with the starting or" the release of the press on the material, and packing elements interposed between the cylinder and plug and surroundingsaid stem.

il. A valve mechanism for use in connection with Ahydraulic presses comprising ya casing i'ormedwith a port, communicating with the high pressure supply and with the cylinder of the press and further having aA lchannel opening into a low pressure reservoir, `a valvular element mounted 'in said casing for separating said port from said channel to discontinue low pressure supply to the press at the starting of the operation of the press on the material, a plug seated in said casing and provided with a guide for said element, a cylinder secured in the plug and formed with a passage opening into the lower end thereof and communicating with the high pressure supply, a stem carried by said element and extending into said cylinder, a piston carried loy the stem v andk arranged'within said cylinder above the point ocomniunication of the passage therewith tor shifting said element to open position on the supply of high pressure to the cylinder to provide for the discharge ot .water from the press through said channel .to the reservoir simultaneously with the starting of the release oit' the press on the material, and an abutment carried by the plug for limiting the opening movement ofv said element. y

5. A valve mechanism for use in connection with hydraulic presses comprising a casing formed with a port communicating with the high pressure supply and with the cylinder of the press and further having a channel opening into a low ypressure reservoir, a valvular element mounted in said casing for separating said port from said channel to discontinue low pressure lsupply to the pressV at the startingk of the operation of the press on the material, a plug seated in said casing and provided with a guide for said element, a cylinder secured in the plug and formed with a passage opening into the lower end thereof and communicatving with the high pressure supply, a stem the CXf'lnder to provide for the discharge of Weten from the press through said che-nne] to the reeervor Simultaneously with the storting of he release of the press on the 5 marteal, an abutment carried by 'the plug for limng the opening movement o Said element, and packing elemente interposed between seid cylndef and plug and enr- :xfmndng' said stem.

In 'testimony whereof, ufx my signn- 10 ture heeo. 

